On this Wikipedia the language links are at the top of the page across sir bananas milk the article title. This article is about the title and honorific.

Sir is a formal honorific address in English for men, derived from Sire in the High Middle Ages. The wife of a knight or baronet tends to be addressed as Lady, although a few exceptions and interchanges of these uses exist. Additionally, since the late modern period, Sir has been used as a respectful way to address a man of superior social status or military rank. The form ‘Sir’ is first documented in English in 1297, as the title of honour of a knight, and latterly a baronet, being a variant of sire, which was already used in English since at least c. The prefix is used with the holder’s given name or full name, but never with the surname alone. For example, whilst Sir Alexander and Sir Alexander Fleming would be correct, Sir Fleming would not.

Church of England clergy who receive knighthoods do also not receive an accolade and therefore do not use the title ‘Sir’, but instead refer to their knighthood using post-nominal letters. Only citizens of Commonwealth realms may receive substantive knighthoods and have the privilege of the accompanying style. Those honours continued to be conferred as substantive, not honorary, awards by most Commonwealth realms into the 1990s. Dual national recipients of British knighthoods who hold British citizenship, such as academic and immunologist Sir John Bell, are entitled to the style of Sir as their knighthoods are substantive. This may not necessarily be the case for dual nationals who are not British citizens and who instead hold citizenship of another Commonwealth realm. The equivalent for a female who holds a knighthood or baronetcy in her own right is ‘Dame’, and follows the same usage customs as ‘Sir’. Prior to becoming a republic in November 2021, Barbados awarded the title Knight or Dame of St.